Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef31a521c8d0843…

MALICIOUS

PDF

72.9 KB Created: 2021-03-03 06:27:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a063478670949634124061297c68d295 SHA-1: 5ead6bf9d2cbed02d50f25a398915fd02f716c71 SHA-256: 0ef31a521c8d084389adee705c0a71fb4ee3dbb0123f6d0bd412a5b6e6d5cc72
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://resalured.ru/award?keyword=summary+of+translating+grandfather%2527s+house PDF link annotation
    • https://modotetizifoxi.weebly.com/uploads/1/3/1/6/131637555/nuxeroxagid.pdfIn PDF document text
    • https://bemixujigimo.weebly.com/uploads/1/3/0/9/130969474/rawowinifi.pdfIn PDF document text
    • https://jenitexul.weebly.com/uploads/1/3/4/8/134859983/6733805.pdfIn PDF document text
    • https://verakolor.weebly.com/uploads/1/3/1/3/131379730/862255.pdfIn PDF document text
    • http://stav-games.ru/8993849642gk9qb.pdfIn PDF document text
    • http://forkidsshop.online/sound_drivers_for_windows_7_64_bit_hp_pavilion_dv69xcwg.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/mazexojegofulu.pdfIn PDF document text
    • http://golden-charm.ru/fedujukaraxek8m8u.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/7105086.pdfIn PDF document text
    • https://vavapeta.weebly.com/uploads/1/3/4/8/134848771/3db40.pdfIn PDF document text
    • https://zeberafuduzugag.weebly.com/uploads/1/3/2/6/132682167/didakubavanorapabaso.pdfIn PDF document text
    • https://bamufikike.weebly.com/uploads/1/3/1/6/131606241/ae80209.pdfIn PDF document text
    • https://wupupuredizuso.weebly.com/uploads/1/3/4/8/134894828/eed8be5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xujitezu/cydia_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/sheet_pan_chicken_thighs_and_baby_potatoes.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/imovie_storyboard_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/reformierte_baptisten_gemeinde_frankfurt.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/windows_10_tinhte._vn.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B7 5444 bytes
SHA-256: b530a163034a0d395e62d3ab2cbfb5a819ff3a52064e1bea46be0d44f3b9cc0e
font_01_sfnt_off0000e60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60D 10044 bytes
SHA-256: 24b99da36b0c37f2078a3ef9d208def68978ca30d10e87765c7418358f1d6c81
font_02_sfnt_off0001086b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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